This guide explores market trends, cost-saving opportunities, and actionable tips for residents and businesses looking to harness solar energy in France's third-largest city. Why Lyon is Embracing Solar Energy Summary: Discover why Lyon is becoming a hotspot for. Obligation d'Achat: surplus buyback at €0. Whether you're a homeowner, business operator, or part. Located in the Northern Temperate Zone, Lyon, France (45. The city experiences an average daily energy production of 6. 24 kWh per kW of installed solar capacity during Summer; this reduces to 3.